Chapter 9: Nutrition Flashcards
Nutrition
A process of obtaining nutrients through food and/or food products to support energy requirements and cellular processes, including growth, repair and maintenance of tissues, reproduction, digestive processes, and respiration.
CDN
Certified Dietitian Nutritionist: state certified dietitian/nutritionist.
Nutrition claim
Claim that a food has a specific nutritional property or provides a specific benefit.
Macronutrients
Food substances required in large amounts to supply energy; include protein, carbohydrate, and fat.
Micronutrients
Vitamins, minerals, and phytonutrients. These are nonenergy yielding nutrients that have important regulatory functions in metabolic pathways.
Vitamins
Group of organic compounds required in small quantities in the diet to support growth and metabolic processes.
Minerals
Inorganic, natural substances, some of which are essential in human nutrition. There are two kinds of minerals: major minerals (aka, macrominerals) and trace minerals.
Protein
Amino acids linked by peptide bonds; the building blocks of body tissues.
Amino acids
Organic building blocks of proteins containing both a carboxyl and an amino group.
Peptide bond
A chemical bond that connects two amino acids.
Essential amino acid (EAA)
Amino acid that must be obtained through the diet as the body does not make it; there are nine essential amino acids.
Substrates
Intermediate forms of nutrients used in metabolic reactions to create adenosine triphosphate.
Protein turnover
A process in which the body breaks down existing proteins and recycles the component amino acids for incorporation into new proteins or other nitrogen-containing compounds.
Complete protein
A protein source that provides all essential amino acids.
Incomplete protein
A protein that lacks one or more of the amino acids required to build cells.
Omnivorous diet
A diet that consists of both animals and plants.
Mutual supplementation
Combination of two incomplete protein sources that together provide all of the essential amino acids.
Protein quality
Refers to the amino acid profile and the digestibility of a protein source.
Low biological value (LBV) proteins
Foods missing one or more of the essential amino acids.
High biological value (HBV) proteins
Foods containing all the essential amino acids.
Protein efficiency ratio
A measure of assessing proteins, based on the amount of weight gained by a test subject divided by the amount of intake of a protein food.
Biological value (BV)
A reference amount used to describe the extent to which the amino acids in a protein source are absorbed.
Protein digestibility-corrected amino acid score (PDCAAS)
A measure for evaluating a protein source based on the composition of amino acids and its digestibility.
Net protein utilization (NPU)
The ratio of amino acid mass turned into proteins compared to the total amino acid mass consumed in the diet
Enterocyte
intestinal cells that absorb nutrients.
Recommended dietary allowance (RDA)
The recommended amount of a nutrient that meets the needs of most healthy individuals within specific age and gender groups.
Negative energy balance
When calorie intake is lower than the number of calories expended.
Acceptable macronutrient distribution range
Ranges of intake for nutrients that are estimated to meet the needs of 97–98% of the population and that are associated with a reduced risk of chronic disease. AMDRs are established by the National Academy of Medicine.
Carbohydrates
Compounds composed of carbon, hydrogen, and oxygen molecules that include simple sugars, complex carbohydrates, glycogen, and fiber.
Simple sugars
Include the monosaccharides and disaccharides; easily absorbed into the bloodstream.
Monosaccharides
Simplest form of carbohydrate; single sugar molecules (e.g., glucose).